【Vue2.0学习】— Vue监视数据的原理（四十二）
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script src="../js/vue.js"></script>
</head>
<body>
<div id="root">
<h2>学生信息</h2>
<button @click="student.age++">年龄+1岁</button><br><br>
<button @click="addSex">添加属性默认值是男</button><br><br>
<button @click="student.sex='未知' ">修改性别</button><br><br>
<button @click="addFriend">在列表的首位添加一个朋友</button><br><br>
<button @click="updateFriend">修改第一个朋友的名字为张飒</button><br><br>
<button @click="addhobby">添加一个爱好</button><br><br>
<button @click="updatehobby">修改第一个爱好为开车</button><br><br>
<h3>姓名：{{student.name}}</h3>
<h3>年龄：{{student.age}}</h3>
<h3 v-if=" student.sex"> 性别：{{student.sex}}</h3>
<h3>爱好</h3>
<ul>
<li v-for="(h,index) in student.hobby" :key="index">{{h}}</li>
</ul>
<h3>学生信息</h3>
<ul>
<li v-for="(f,index) in student.friends" :key="index">{{f.name}}-{{f.age}}</li>
</ul>
</div>
<script>
const vm = new Vue({
el: '#root',
data: {
student: {
name: '张三',
age: 18,
hobby: ['抽烟', '喝酒', '烫头'],
friends: [{
name: '小王',
age: 20
}, {
name: '李四',
age: 22
}]
}
},
methods: {
addSex() {
this.$set(this.student, 'sex', '男')
// Vue.set(this.student, 'sex', '男')
},
addFriend() {
this.student.friends.unshift({
name: 'jack',
age: 26
})
},
updateFriend() {
this.student.friends[0].name = '张飒'
},
addhobby() {
this.student.hobby.push('打球')
},
updatehobby() {
this.student.hobby.splice(0, 1, '开车')
}
}
})
</script>
</body>
</html>
